large loop-coupling enhancement of a heavy pseudoscalar from a light dark sector
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ID: 168646
2017
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Abstract
The small background and the sensitivity to charged particles via a leading order loop coupling make the diphoton channel a privileged experimental test for new physics models. We propose a simple archetypal scenario to generate a sharp di-photon resonance as a result of threshold enhancements in the effective coupling between a heavy pseudoscalar particle and new vector-like leptons. We therefore study three different scenarios consistent with the current experimental limits and deviating from the Standard Model at the 2 σ level. The model also introduces a natural dark matter candidate able to match the observed dark matter abundance and comfortably respect the current direct detection constraints.
| Reference Key |
chiara2017nuclearlarge
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|---|---|
| Authors | ;Stefano Di Chiara;Andi Hektor;Kristjan Kannike;Luca Marzola;Martti Raidal |
| Journal | biology and fertility of soils |
| Year | 2017 |
| DOI |
10.1016/j.nuclphysb.2017.02.001
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| URL | |
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